Sierra Graphics Glitch HD4600

[longxk]

To get 1536MB VRAM and GPU acceleration, I use Clover to inject 8086:0412 device-Id and 0x0d220003 ig-platform-id.
This will only give me 1920*1080@60Hz, so I use Clover to patch AppleIntelFramebufferAzul to modify framebuffer size.
At this point, the display can run at 4K@30Hz, but there are some glitches at top and bottom area of the display. See attached video and image. LINK.
I can still use CoreDisplay patch in mac-pixel-clock-patch-V2 to achieve 4k@60Hz, but glitches remain.
Without the VRAM and GPU acceleration patch, the display is fine at 4K@60Hz(I can tell with my eyes).
Also tried some boot graphics glitch patch, none of them works.
Please help me to fix this, thanks.

i7-4790, Q87, HD4600, 1*VGA 2*DP.

 

[JoelJoJoJr]

To get 1536MB VRAM and GPU acceleration, I use Clover to inject 8086:0412 device-Id and 0x0d220003 ig-platform-id.
This will only give me 1920*1080@60Hz, so I use Clover to patch AppleIntelFramebufferAzul to modify framebuffer size.
At this point, the display can run at 4K@30Hz

Hi, I have an HD4600 as well, and I can't get 4K out of it. Can you please post which Clover Patch you used to get it to work on Sierra?